maybe he was tallking about a 340 based motor then. he was talking about some new 340 blocks that can be majorly over bored. thats probly it. I did see a scat kit for a 360 into a 416 dont think it's for the magnums though.

The old 340 "X" blocks, so it says on the paper work, can be bored .060 over and still reliably run 2.5 horsepower per cubic inch. The newer 340 blocks from M.P. are siamesse bore. I don't know much about them other then listening to how bad my brother wants one:tonka: